Optimized Single-Shot Photonic Time-Stretch Digitizer Using Complementary Parallel Single-Sideband Modulation Architecture and Digital Signal Processing

A novel single-shot photonic time-stretch digitizer scheme is proposed based on complementary parallel single-sideband modulation architecture. Successive digital signal processing, including linearization operation and phase compensation, is employed to improve the performance. Both theoretical analysis and simulation results show that the proposed scheme can simultaneously solve the three vital problems in the single-shot photonic time-stretch digitizers, i.e., removal of the dynamic pulse envelope variation, the dispersion-induced penalty, and suppression of the modulation-induced distortion. Hence, the proposed single-shot photonic time-stretch digitizer can overcome the dispersion-induced bandwidth limitation and realize linearization performance.